The Interaction of Squeezed Light with Atoms

Parkins, A. S.

doi:10.1002/9780470141441.ch9

Cited by 8 publications

(6 citation statements)

References 69 publications

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“…We observe subnatural fluorescence linewidths and a strong dependence of the Mollow triplet spectrum on the relative phase of the driving and squeezed vacuum fields, in excellent agreement with theoretical predictions. These results enable experimental access to the many theoretical studies on atomic spectra in squeezed reservoirs that have followed [9,10], and demonstrate the utility of resonance fluorescence for the characterization of itinerant squeezed states, an important capability for the development of proposed schemes to enhance qubit readout with microwave-frequency squeezed light [16,17].…”

Section: Introductionmentioning

confidence: 76%

“…As the Mollow triplet provides a clear signature of coherent lightmatter coupling, in recent years such spectra have been widely applied to probe quantum coherence in artificial atoms based on quantum dots [3] and superconducting qubits [4,5]. Resonance fluorescence is predicted to offer analogous spectroscopic means to identify and characterize atomic interactions with squeezed light [6][7][8][9][10], which is known for its potential to enhance measurement precision in applications ranging from gravitational wave detectors [11] to biological imaging [12]. However, it remains a challenge to demonstrate that exciting atomic systems with squeezed light strongly modifies resonance fluorescence, in part due to the stringent requirement that nearly all the modes in the atom's electromagnetic environment must be squeezed [13].…”

Section: Introductionmentioning

confidence: 99%

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Resonance Fluorescence from an Artificial Atom in Squeezed Vacuum

et al. 2016

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We present an experimental realization of resonance fluorescence in squeezed vacuum. We strongly couple microwave-frequency squeezed light to a superconducting artificial atom and detect the resulting fluorescence with high resolution enabled by a broadband traveling-wave parametric amplifier. We investigate the fluorescence spectra in the weak and strong driving regimes, observing up to 3.1 dB of reduction of the fluorescence linewidth below the ordinary vacuum level and a dramatic dependence of the Mollow triplet spectrum on the relative phase of the driving and squeezed vacuum fields. Our results are in excellent agreement with predictions for spectra produced by a two-level atom in squeezed vacuum [Phys. Rev. Lett. 58, 2539-2542], demonstrating that resonance fluorescence offers a resource-efficient means to characterize squeezing in cryogenic environments.

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Section: Introductionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Resonance Fluorescence from an Artificial Atom in Squeezed Vacuum

et al. 2016

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show abstract

“…We observe subnatural fluorescence linewidths and a strong dependence of the Mollow triplet spectrum on the relative phase of the driving and squeezed vacuum fields, in excellent agreement with theoretical predictions. These results enable experimental access to the many theoretical studies on atomic spectra in squeezed reservoirs that have followed [9,10] and demonstrate the utility of resonance fluorescence for the characterization of itinerant squeezed states, an important capability for the development of proposed schemes to enhance qubit readout with microwavefrequency squeezed light [16,17].…”

Section: Introductionmentioning

confidence: 78%

“…As the Mollow triplet provides a clear signature of coherent light-matter coupling, in recent years such spectra have been widely applied to probe quantum coherence in artificial atoms based on quantum dots [3] and superconducting qubits [4,5]. Resonance fluorescence is predicted to offer analogous spectroscopic means to identify and characterize atomic interactions with squeezed light [6][7][8][9][10], which is known for its potential to enhance measurement precision in applications ranging from gravitational wave detectors [11] to biological imaging [12]. However, it remains a challenge to demonstrate that exciting atomic systems with squeezed light strongly modifies resonance fluorescence, in part because of the stringent requirement that nearly all the modes in the atom's electromagnetic environment must be squeezed [13].…”

Section: Introductionmentioning

confidence: 99%

Squeezed Light Reengineers Resonance Fluorescence

Carmichael

2016

Physics

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We present an experimental realization of resonance fluorescence in squeezed vacuum. We strongly couple microwave-frequency squeezed light to a superconducting artificial atom and detect the resulting fluorescence with high resolution enabled by a broadband traveling-wave parametric amplifier. We investigate the fluorescence spectra in the weak and strong driving regimes, observing up to 3.1 dB of reduction of the fluorescence linewidth below the ordinary vacuum level and a dramatic dependence of the Mollow triplet spectrum on the relative phase of the driving and squeezed vacuum fields. Our results are in excellent agreement with predictions for spectra produced by a two-level atom in squeezed vacuum [Phys. Rev. Lett. 58, 2539 (1987)], demonstrating that resonance fluorescence offers a resource-efficient means to characterize squeezing in cryogenic environments.

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“…at which the output OPO field exhibits 50% squeezing [29,37]. Moreover, it shows that to satisfy the requirement that the output OPO field is broadband compared to the damping rates of the cavities, the decay rate of the OPO cavity γ c should be larger than the decay rates of the cavities A and B.…”

Section: Description Of the Modelmentioning

confidence: 99%

Delayed transfer of entanglement to initially populated qubits

Bougouffa,

Ficek

2020

Preprint

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The transfer of entangled, quantum correlated, flying photons from a squeezed field to single-mode cavities is investigated. It is shown that, while the transfer of photons begins immediately after the input squeezed field is turned on, the time at which quantum correlations start to be transferred to the cavities is strongly dependent on the initial population of the cavities. For the initially empty cavities, the transfer of quantum correlations begins immediately after the squeezed field is turned on, but it is delayed by a certain time interval when the cavities are initially populated. We find that the transfer of the quantum correlations is postponed until the one-photon states of the system are almost completely depopulated. In other words, the system "waits" for the population of the single-photon states to decay out before starting to build up the quantum correlation between the cavities. The delay time interval is independent of the number of photons initially present in the system, but it is dependent on the decay rates of the cavities and can be varied (controlled) when the cavities decay with different rates. It is shown that the delayed transfer of the quantum correlation is directly related to the presence of quantum jumps, which transfer the population from the entangled to incoherent mixture states.

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The Interaction of Squeezed Light with Atoms

Cited by 8 publications

References 69 publications

Resonance Fluorescence from an Artificial Atom in Squeezed Vacuum

Resonance Fluorescence from an Artificial Atom in Squeezed Vacuum

Squeezed Light Reengineers Resonance Fluorescence

Delayed transfer of entanglement to initially populated qubits

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